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1 /* |
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2 * Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of the License "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Implementation of CHttpCachePostponeWriteUtilities |
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15 * |
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16 */ |
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17 |
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18 // INCLUDE FILES |
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19 #include "HttpCachePostponeWriteUtilities.h" |
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20 #include "HttpCacheUtil.h" |
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21 |
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22 // EXTERNAL DATA STRUCTURES |
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23 |
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24 // EXTERNAL FUNCTION PROTOTYPES |
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25 |
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26 // CONSTANTS |
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27 |
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28 // MACROS |
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29 |
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30 // LOCAL CONSTANTS AND MACROS |
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31 |
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32 // MODULE DATA STRUCTURES |
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33 |
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34 // LOCAL FUNCTION PROTOTYPES |
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35 |
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36 // FORWARD DECLARATIONS |
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37 |
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38 // ============================= LOCAL FUNCTIONS =============================== |
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39 |
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40 // ============================ MEMBER FUNCTIONS =============================== |
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41 |
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42 // ----------------------------------------------------------------------------- |
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43 // CHttpCacheEntryAsyncWriteHelper::CHttpCacheEntryAsyncWriteHelper |
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44 // ----------------------------------------------------------------------------- |
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45 // |
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46 CHttpCacheEntryAsyncWriteHelper::CHttpCacheEntryAsyncWriteHelper(TRequestStatus& aStatus, MHttpCacheWriteSource* aSource, TInt aPriority) |
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47 : CActive(aPriority), |
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48 iSignalStatus(aStatus), |
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49 iSource(aSource) |
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50 { |
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51 } |
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52 |
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53 // ----------------------------------------------------------------------------- |
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54 // CHttpCacheEntryAsyncWriteHelper::NewL |
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55 // ----------------------------------------------------------------------------- |
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56 // |
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57 CHttpCacheEntryAsyncWriteHelper* CHttpCacheEntryAsyncWriteHelper::NewL(MHttpCacheWriteSource* aSource, TRequestStatus& aStatus) |
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58 { |
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59 CHttpCacheEntryAsyncWriteHelper *obj = new (ELeave) CHttpCacheEntryAsyncWriteHelper(aStatus, aSource, EPriorityHigh); |
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60 CleanupStack::PushL(obj); |
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61 obj->ConstructL(); |
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62 CleanupStack::Pop(obj); |
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63 return obj; |
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64 } |
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65 |
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66 // ----------------------------------------------------------------------------- |
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67 // CHttpCacheEntryAsyncWriteHelper::~CHttpCacheEntryAsyncWriteHelper |
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68 // ----------------------------------------------------------------------------- |
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69 // |
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70 CHttpCacheEntryAsyncWriteHelper::~CHttpCacheEntryAsyncWriteHelper() |
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71 { |
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72 Cancel(); |
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73 } |
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74 |
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75 // ----------------------------------------------------------------------------- |
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76 // CHttpCacheEntryAsyncWriteHelper::DoCancel |
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77 // ----------------------------------------------------------------------------- |
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78 // |
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79 void CHttpCacheEntryAsyncWriteHelper::DoCancel() |
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80 { |
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81 TRequestStatus *stat = &(TRequestStatus&)iSignalStatus; |
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82 User::RequestComplete(stat, KErrCancel); // Signal cancellation to the observer. |
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83 // cannot meaningfully do anything with the unwritten data assuming there is some. |
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84 // we will clean it up when we are deleted. |
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85 iSource->BodyFile().Close(); |
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86 iSource->BodyWriteComplete(); |
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87 #ifdef __CACHELOG__ |
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88 HttpCacheUtil::WriteFormatLog(0, _L("CACHEPOSTPONE: CHttpCacheEntryAsyncWriteHelper::DoCancel called on object %08x"), this); |
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89 #endif |
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90 } |
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91 |
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92 // ----------------------------------------------------------------------------- |
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93 // CHttpCacheEntryAsyncWriteHelper::WriteNextBodyBlock |
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94 // ----------------------------------------------------------------------------- |
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95 // |
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96 void CHttpCacheEntryAsyncWriteHelper::WriteNextBodyBlock() |
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97 { |
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98 #ifdef __CACHELOG__ |
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99 HttpCacheUtil::WriteFormatLog(0, _L("CACHEPOSTPONE: CHttpCacheEntryAsyncWriteHelper::WriteNextBodyBlock called on object %08x for block %d"), this, iBodyPart ); |
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100 #endif |
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101 |
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102 TPtrC8 bufferPtr( iSource->BodyData().GetSegmentData(iBodyPart) ); |
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103 iSource->BodyFile().Write(bufferPtr, iStatus); |
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104 } |
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105 |
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106 // ----------------------------------------------------------------------------- |
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107 // CHttpCacheEntryAsyncWriteHelper::RunL |
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108 // ----------------------------------------------------------------------------- |
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109 // |
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110 void CHttpCacheEntryAsyncWriteHelper::RunL() |
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111 { |
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112 /* General algorithm. |
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113 * Write out next section of body data unless done. Then write out header data. |
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114 */ |
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115 #ifdef __CACHELOG__ |
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116 HttpCacheUtil::WriteFormatLog(0, _L("CACHEPOSTPONE: CHttpCacheEntryAsyncWriteHelper::RunL called on object %08x"), this); |
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117 #endif |
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118 if ( iSource->BodyData().Count() > iBodyPart ) |
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119 { |
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120 WriteNextBodyBlock(); |
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121 SetActive(); |
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122 } |
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123 else |
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124 { |
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125 #ifdef __CACHELOG__ |
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126 HttpCacheUtil::WriteFormatLog(0, _L("CACHEPOSTPONE: - body write completed with status code %d"), iStatus.Int()); |
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127 #endif |
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128 // Body file writing is complete |
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129 iSource->BodyFile().Close(); |
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130 iSource->BodyWriteComplete(); |
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131 TRequestStatus *stat = &(TRequestStatus&)iSignalStatus; |
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132 User::RequestComplete(stat, iStatus.Int()); // signal completion to observer |
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133 } |
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134 } |
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135 |
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136 // ----------------------------------------------------------------------------- |
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137 // CHttpCacheEntryAsyncWriteHelper::GetResult |
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138 // ----------------------------------------------------------------------------- |
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139 // |
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140 TInt CHttpCacheEntryAsyncWriteHelper::GetResult() |
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141 { |
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142 return iStatus.Int(); |
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143 } |
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144 |
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145 // ----------------------------------------------------------------------------- |
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146 // CHttpCacheEntryAsyncWriteHelper::ConstructL |
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147 // ----------------------------------------------------------------------------- |
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148 // |
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149 void CHttpCacheEntryAsyncWriteHelper::ConstructL() |
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150 { |
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151 CActiveScheduler::Add(this); |
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152 iSource->BodyWriteInProgress(); |
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153 // setup to arrive in RunL when next possible. |
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154 SetActive(); |
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155 TRequestStatus *stat = &(TRequestStatus&)iStatus; |
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156 User::RequestComplete(stat, KErrNone); |
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157 } |
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158 |
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159 // ----------------------------------------------------------------------------- |
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160 // CSegmentedHeapBuffer::~CSegmentedHeapBuffer |
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161 // ----------------------------------------------------------------------------- |
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162 // |
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163 CSegmentedHeapBuffer::~CSegmentedHeapBuffer() |
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164 { |
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165 Reset(); |
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166 } |
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167 |
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168 // ----------------------------------------------------------------------------- |
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169 // CSegmentedHeapBuffer::ConstructL |
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170 // ----------------------------------------------------------------------------- |
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171 // |
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172 void CSegmentedHeapBuffer::ConstructL() |
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173 { |
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174 } |
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175 |
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176 // ----------------------------------------------------------------------------- |
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177 // CSegmentedHeapBuffer::NewL |
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178 // ----------------------------------------------------------------------------- |
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179 // |
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180 CSegmentedHeapBuffer *CSegmentedHeapBuffer::NewL(TInt aBufferSize, TInt aCompressGranularity) |
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181 { |
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182 CSegmentedHeapBuffer *obj= new (ELeave) CSegmentedHeapBuffer(aBufferSize, aCompressGranularity); |
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183 CleanupStack::PushL(obj); |
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184 obj->ConstructL(); |
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185 CleanupStack::Pop(obj); |
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186 |
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187 return obj; |
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188 } |
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189 |
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190 // ----------------------------------------------------------------------------- |
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191 // CSegmentedHeapBuffer::AppendL |
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192 // ----------------------------------------------------------------------------- |
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193 // |
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194 void CSegmentedHeapBuffer::AppendL(TInt& aRemainder, const TDesC8& aDes) |
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195 { |
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196 aRemainder = aDes.Length(); // consumed nothing yet. |
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197 TInt workingLen; |
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198 TInt workingOffset=0; // read position in source descriptor |
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199 HBufC8* currentBuffer; |
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200 |
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201 TInt lastBuffer = iBufferList.Count()-1; |
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202 if ( lastBuffer < 0 ) |
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203 { |
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204 // TODO: Make the first block only equal to the size of data we need? |
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205 // Take some traces to see what happens. |
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206 |
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207 // no blocks allocated. May leave here if we can't get space. |
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208 currentBuffer = HBufC8::NewLC(iBufferSize); |
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209 iBufferList.AppendL(currentBuffer); |
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210 CleanupStack::Pop(currentBuffer); |
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211 lastBuffer = 0; |
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212 } |
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213 else |
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214 { |
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215 currentBuffer = iBufferList[lastBuffer]; |
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216 } |
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217 |
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218 // here, currentBuffer always points to a buffer we can use. |
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219 while ( aRemainder ) |
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220 { |
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221 workingLen = iBufferSize - currentBuffer->Length(); // workingLen = amount of space left in this segment |
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222 workingLen = (aRemainder > workingLen) ? workingLen : aRemainder; // workingLen = smaller of (amount of data left in source) or (amount of space left in current segment) |
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223 if ( workingLen ) |
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224 { |
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225 // we have some space in this block to store data. |
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226 TPtr8 ptr(currentBuffer->Des()); |
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227 ptr.Append(aDes.Mid(workingOffset ,workingLen)); |
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228 } |
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229 aRemainder -= workingLen; // track how much is consumed |
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230 workingOffset += workingLen; // remember where we get the next bit from in the source |
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231 if ( aRemainder ) |
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232 { |
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233 // we have more data to store, append another block. Might result in a leave. |
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234 currentBuffer = HBufC8::NewLC(iBufferSize); |
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235 iBufferList.AppendL(currentBuffer); |
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236 CleanupStack::Pop(currentBuffer); |
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237 } |
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238 } |
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239 // will only exit here if we consumed all data |
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240 } |
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241 |
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242 // ----------------------------------------------------------------------------- |
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243 // CSegmentedHeapBuffer::Length |
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244 // ----------------------------------------------------------------------------- |
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245 // |
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246 TInt CSegmentedHeapBuffer::Length() |
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247 { |
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248 // all segments are same size except last one |
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249 TInt len = 0; |
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250 TInt count = iBufferList.Count(); |
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251 if ( count ) |
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252 { |
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253 len = iBufferSize * (count - 1); // all segments are same size except last one |
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254 len += iBufferList[count-1]->Length(); |
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255 } |
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256 return len; |
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257 } |
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258 |
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259 // ----------------------------------------------------------------------------- |
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260 // CSegmentedHeapBuffer::SpareCapacity |
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261 // ----------------------------------------------------------------------------- |
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262 // |
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263 TInt CSegmentedHeapBuffer::SpareCapacity() |
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264 { |
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265 TInt len = 0; |
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266 TInt count = iBufferList.Count(); |
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267 if ( count ) |
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268 { |
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269 len = iBufferSize - (iBufferList[count-1]->Length()); |
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270 } |
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271 |
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272 // return how much is left in last segment. |
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273 return len; |
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274 } |
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275 |
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276 // ----------------------------------------------------------------------------- |
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277 // CSegmentedHeapBuffer::Count |
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278 // ----------------------------------------------------------------------------- |
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279 // |
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280 TInt CSegmentedHeapBuffer::Count() |
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281 { |
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282 return iBufferList.Count(); // number of segments |
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283 } |
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284 |
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285 // ----------------------------------------------------------------------------- |
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286 // CSegmentedHeapBuffer::GetSegmentData |
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287 // ----------------------------------------------------------------------------- |
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288 // |
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289 TPtrC8 CSegmentedHeapBuffer::GetSegmentData(TInt& aSegment) |
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290 { |
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291 return iBufferList[aSegment++]->Des(); |
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292 } |
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293 |
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294 // ----------------------------------------------------------------------------- |
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295 // CSegmentedHeapBuffer::ReleaseSegmentData |
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296 // ----------------------------------------------------------------------------- |
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297 // |
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298 void CSegmentedHeapBuffer::ReleaseSegmentData(const TInt aSegment) |
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299 { |
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300 HBufC8* buf = iBufferList[aSegment]; |
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301 iBufferList[aSegment] = 0; // don't want to reshuffle contents |
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302 delete buf; |
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303 } |
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304 |
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305 // ----------------------------------------------------------------------------- |
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306 // CSegmentedHeapBuffer::Compress |
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307 // ----------------------------------------------------------------------------- |
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308 // |
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309 void CSegmentedHeapBuffer::Compress() |
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310 { |
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311 TInt count = iBufferList.Count(); |
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312 if ( count ) |
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313 { |
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314 HBufC8* buf = iBufferList[count-1]; |
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315 // first, see if we can shrink by at least one iCompressGranularity |
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316 if ( iBufferSize - buf->Length() >= iCompressGranularity ) |
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317 { |
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318 // calculate new size |
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319 TInt newsize = (iCompressGranularity * (1 + (buf->Length() / iCompressGranularity))); |
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320 HBufC8 *newbuf = buf->ReAlloc(newsize); |
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321 // we should be realloc'ing in place since we're shrinking this piece, but you never know. |
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322 // don't care if realloc operation fails since it will leave original data alone. |
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323 if ( newbuf ) |
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324 { |
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325 iBufferList[count-1] = newbuf; |
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326 } |
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327 } |
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328 } |
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329 } |
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330 |
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331 // ----------------------------------------------------------------------------- |
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332 // CSegmentedHeapBuffer::Reset |
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333 // ----------------------------------------------------------------------------- |
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334 // |
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335 void CSegmentedHeapBuffer::Reset() |
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336 { |
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337 iBufferList.ResetAndDestroy(); // call delete on all buffers |
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338 } |
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339 |
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340 // ----------------------------------------------------------------------------- |
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341 // CSegmentedHeapBuffer::CSegmentedHeapBuffer |
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342 // ----------------------------------------------------------------------------- |
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343 // |
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344 CSegmentedHeapBuffer::CSegmentedHeapBuffer(TInt aBufferSize, TInt aCompressGranularity) : iBufferSize(aBufferSize), iCompressGranularity(aCompressGranularity) |
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345 { |
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346 } |
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347 |
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348 // ----------------------------------------------------------------------------- |
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349 // CHttpCacheWriteTimeout::CHttpCacheWriteTimeout |
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350 // ----------------------------------------------------------------------------- |
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351 // |
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352 CHttpCacheWriteTimeout::CHttpCacheWriteTimeout( const TInt aTimeout ) |
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353 : CActive(EPriorityStandard), |
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354 iTimeout(aTimeout) // Standard priority |
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355 { |
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356 } |
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357 |
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358 // ----------------------------------------------------------------------------- |
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359 // CHttpCacheWriteTimeout::NewLC |
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360 // ----------------------------------------------------------------------------- |
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361 // |
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362 CHttpCacheWriteTimeout* CHttpCacheWriteTimeout::NewLC(const TInt aTimeout) |
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363 { |
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364 CHttpCacheWriteTimeout* self = new ( ELeave ) CHttpCacheWriteTimeout(aTimeout); |
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365 CleanupStack::PushL(self); |
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366 self->ConstructL(); |
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367 return self; |
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368 } |
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369 |
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370 // ----------------------------------------------------------------------------- |
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371 // CHttpCacheWriteTimeout::NewL |
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372 // ----------------------------------------------------------------------------- |
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373 // |
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374 CHttpCacheWriteTimeout* CHttpCacheWriteTimeout::NewL(const TInt aTimeout) |
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375 { |
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376 CHttpCacheWriteTimeout* self = CHttpCacheWriteTimeout::NewLC(aTimeout); |
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377 CleanupStack::Pop(); // self; |
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378 return self; |
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379 } |
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380 |
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381 // ----------------------------------------------------------------------------- |
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382 // CHttpCacheWriteTimeout::ConstructL |
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383 // ----------------------------------------------------------------------------- |
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384 // |
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385 void CHttpCacheWriteTimeout::ConstructL() |
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386 { |
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387 User::LeaveIfError(iTimer.CreateLocal()); // Initialize timer |
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388 CActiveScheduler::Add(this); // Add to scheduler |
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389 } |
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390 |
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391 // ----------------------------------------------------------------------------- |
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392 // CHttpCacheWriteTimeout::~CHttpCacheWriteTimeout |
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393 // ----------------------------------------------------------------------------- |
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394 // |
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395 CHttpCacheWriteTimeout::~CHttpCacheWriteTimeout() |
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396 { |
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397 Cancel(); // Cancel any request, if outstanding |
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398 iTimer.Close(); // Destroy the RTimer object |
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399 // Delete instance variables if any |
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400 } |
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401 |
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402 // ----------------------------------------------------------------------------- |
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403 // CHttpCacheWriteTimeout::DoCancel |
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404 // ----------------------------------------------------------------------------- |
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405 // |
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406 void CHttpCacheWriteTimeout::DoCancel() |
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407 { |
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408 iTimer.Cancel(); |
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409 } |
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410 |
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411 // ----------------------------------------------------------------------------- |
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412 // CHttpCacheWriteTimeout::Start |
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413 // ----------------------------------------------------------------------------- |
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414 // |
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415 void CHttpCacheWriteTimeout::Start(TCallBack aCallbackFn, TAny *aToken) |
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416 { |
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417 Cancel(); // Cancel any request, just to be sure |
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418 |
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419 iToken = aToken; |
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420 iCallbackFn = aCallbackFn; |
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421 |
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422 iTimer.After(iStatus, iTimeout); // Set for later |
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423 SetActive(); // Tell scheduler a request is active |
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424 } |
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425 |
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426 // ----------------------------------------------------------------------------- |
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427 // CHttpCacheWriteTimeout::RunL |
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428 // ----------------------------------------------------------------------------- |
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429 // |
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430 void CHttpCacheWriteTimeout::RunL() |
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431 { |
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432 iCallbackFn.iFunction(iToken); |
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433 } |
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434 |
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435 // ----------------------------------------------------------------------------- |
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436 // CHttpCacheWriteTimeout::RunError |
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437 // ----------------------------------------------------------------------------- |
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438 // |
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439 TInt CHttpCacheWriteTimeout::RunError(TInt aError) |
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440 { |
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441 return aError; |
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442 } |
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443 |
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444 // End of File |